It still exists at https://archive.org/details/music_202007 .

The archive.org variation appears to be missing both samples and descriptions.

A ported version got made over at: https://ishkur.kenxaj.cyou/

Appears to have all the music files and descriptions from a cursory inspection, although missing Tools, Samples, and Sounds.

Gives credit to Ishkur, recommends checking v3, and was made using: https://github.com/igorbrigadir/ishkurs-guide-dataset/